package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    CategoryMapper categoryMapper;
    @Autowired
    DishMapper dishMapper;
    @Autowired
    SetmealMapper setmealMapper;

    /**
     * 新增分类
     */
    @Override
    public void save(CategoryDTO categoryDTO) {
        Category category = new Category();

        //属性拷贝
        BeanUtils.copyProperties(categoryDTO,category);

        //设置默认状态：启用
        category.setStatus(StatusConstant.ENABLE);

        //category.setCreateTime(LocalDateTime.now());
        //category.setUpdateTime(LocalDateTime.now());
        //category.setCreateUser(BaseContext.getCurrentId());

        categoryMapper.insert(category);
    }

    /**
     * 分页查询
     */
    @Override
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {
        PageHelper.startPage(categoryPageQueryDTO.getPage(),categoryPageQueryDTO.getPageSize());
        Page<Category> page = categoryMapper.pageQuery(categoryPageQueryDTO);
        return new PageResult(page.getPages(), page.getResult());
    }

    /**
     * 根据Id删除分类
     */
    @Override
    public void deleteById(Integer id) {
        Integer dishCounts = dishMapper.count(id);

        //判断菜品分类下是否存在菜品
        if (dishCounts != 0 ){
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
        //判断套餐分类下是否存在菜品
        Integer setmealCount = setmealMapper.count(id);
        if (setmealCount != 0 ){
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }

        categoryMapper.deleteById(id);
    }

    /**
     * 修改分类
     */
    @Override
    public void update(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO,category);

        //category.setUpdateTime(LocalDateTime.now());
        //category.setUpdateUser(BaseContext.getCurrentId());

        categoryMapper.update(category);
    }

    /**
     * 启用禁用状态
     */
    @Override
    public void status(Integer status, Long id) {

        //构建
        Category category = Category.builder()
                .status(status)
                .id(id).build();

        //category.setUpdateUser(BaseContext.getCurrentId());

        categoryMapper.update(category);

    }

    /**
     * 根据类型查询分类
     */
    @Override
    public List<Category> selectByType(Integer type) {
        List<Category> list = categoryMapper.selectByType(type);
        return list;
    }
}
